Thanks to all for their replies. It breaks my heart every time I see a dead bird. I also fear
for the life of my cat, since coyotes show up in the neighborhood. Nevertheless, I feel I have to
strike a compromise. At the risk of raising a storm of protest, I assert that my cat would be even
more deprived of a full life than I would be if I were confined to an exclusively indoor life. And I
don't think a "catio" would suffice.
So I do as much as I can: I don't let the cat out until several hours after dawn, limit him to a few hours a day,
restrict him severely when baby robins are due out of the nest, and in general try to keep him with me as I
work in my very large garden and yard. If my cat were catching birds often, I would
probably change my mind and keep him in altogether.
I acknowledge the amazing predatory abilities: my cat is quite small (8 1/2 lbs) and has no front claws (that way
when adopted), so I expected him to be unable to snag anything. But he's still capable. Honestly, I feel the voles
are fair game, but any bird breaks my heart. I've been here 47 years but never seen a bushtit caught until now.